Key card cam lock

Abstract

A key card cam lock comprising an outer casing (1), a lock body (2), a lock base (3), a lock cover (4), a rotary sleeve (5), an electromagnet (6), locking pieces (7) and locking piece springs (8), a tail piece (9), a retaining ring (10), steel balls (13), steel ball springs (14), a mounting base (15), a battery holder (16), a carrier (17), step bars (18), pins (19), and pin springs (20), wherein the lock body (2) and the lock cover (4) are connected to each other to form a receiving space, wherein the lock cover (4) is fixedly arranged in the outer casing (1), wherein the lock base (3) is received in the lock body (2), wherein the tail piece (9) is inserted onto the lock base (3), wherein the tail piece (9) is connected to a lock core end (11) by screws, so that the tail piece (9) can rotate on the lock base (3). can, wherein the rotating sleeve (5) is fixedly arranged in the lock housing (2),wherein the locking pieces (7) are provided in the rear part (9), the front end of each locking piece (7) being rounded, the two ends of the locking piece spring (8) each abutting a central hole of the locking piece (7) and a limiting shaft of the rear part (9), the inner wall of the rotating sleeve (5) forming a shaft ring (51), the rounded front end of the locking piece (7) being in contact with the shaft ring (51) of the rotating sleeve (5), the electromagnet (6) being fixedly installed in the rear part (9), a blocking shaft (61) being placed on the movable iron core of the electromagnet (6), the blocking shaft (61) being able to move back and forth between the two locking pieces (7), whereby the blocking shaft (61) can abut against or be separated from the two locking pieces (7); and the lock base (3) being provided with a steel ball rotating groove (33),wherein the steel ball rotation groove (33) of the lock base (3) contains a plurality of limiting grooves (35) for limiting the position of the steel balls (13), wherein two through holes (91) for receiving the steel balls (13) are formed on the rear part (9), wherein the steel ball springs (14) and the steel balls (13) are successively brought into the through holes (91) of the rear part (9), wherein the carrier (17) is attached to the upper side of the rear part (9) so that the steel balls (13) are limited by the steel ball springs (14) in the limiting grooves (35) of the lock base (3).

Description

[0001] The invention relates to a lock, in particular a key card cam lock. State of the art

[0002] Key card cam locks differ from mechanical cam locks. For hierarchical lock management, a certain number of cards can be entered. It is suitable for various public door cabinets, business cabinets, and the like. Currently marketed key card cam locks cannot be used normally when the battery is dead. Replacing the battery requires opening the case, which is troublesome. If the electronic components fail, the entire lock must be removed, making the lock almost unusable. Existing key card cam locks cannot guarantee that they are always ready, and replacing the battery is laborious.From CN 106 168 085 A, a security magnetic card lock is known, comprising a lock cover, a battery assembly, a circuit board assembly, a motor, a lock seat, a lock core, a tongue, and a magnetic card, wherein the lock cover is mounted relatively rotatably on the lock seat. A central cavity is formed between the lock cover and the lock seat, and a central hole is formed in the lock seat to communicate with the central cavity. The battery component, the circuit board assembly, and the tailstock are mounted in the central cavity in a manner fixed relative to the lock cover. Contents of the invention

[0003] The object of the invention is to provide a key card cam lock that features quick disassembly, emergency release and easy battery replacement.

[0004] This object is achieved by the key card cam lock of the invention, which comprises an outer casing, a lock body, a lock base, a lock cover, a rotary sleeve, an electromagnet, locking pieces and locking piece springs, a rear part, a retaining ring, steel balls, steel ball springs, a mounting base, a battery holder, a carrier, step bars, pins, and pin springs. The lock body and the lock cover are connected to each other to form a receiving space. The lock cover is fixedly arranged in the outer casing. The lock base is received in the lock body. The rear part is inserted onto the lock base. The rear part is connected to the lock core end by screws so that the rear part can rotate on the lock base. The rotary sleeve is fixedly arranged in the lock body. Locking pieces are provided in the rear part. The front end of each locking piece is rounded.wherein the two ends of the locking piece spring each abut a central hole of the locking piece and a limiting shaft of the rear part, wherein the inner wall of the rotating sleeve forms a wave ring, wherein the rounded front end of the locking piece is in contact with the wave ring of the rotating sleeve, wherein the electromagnet is fixedly installed in the rear part, wherein a blocking shaft is placed on the movable iron core of the electromagnet, wherein the blocking shaft can move back and forth between the two locking pieces, whereby the blocking shaft can abut against or be separated from the two locking pieces; and wherein the lock base is provided with a steel ball rotation groove, wherein the steel ball rotation groove of the lock base contains a plurality of limiting grooves for limiting the position of the steel balls, wherein two through holes for receiving steel balls are formed on the rear part,wherein the steel ball springs and the steel balls are successively placed into the through holes of the tail part, wherein the carrier is attached to the top of the tail part, so that the steel balls are confined by the steel ball springs in the confining grooves of the lock base.

[0005] The lock base is provided with three annular grooves around the center, the three annular grooves being, from the inside to the outside, an unlocking rotation groove, an emergency rotation groove, and a steel ball rotation groove. The unlocking rotation groove and the emergency rotation groove serve to cooperate with the blocking shaft of the electromagnet. A blocking shaft passage is provided between the unlocking rotation groove and the emergency rotation groove in the radial direction. In the locked state, the blocking shaft of the electromagnet is located vertically in the passage, allowing the electromagnet to retract and extend.

[0006] The outer casing is provided with a plurality of countersunk holes for receiving the pin springs and the pins, wherein the pin springs and the pins are successively inserted into the countersunk holes of the outer casing and are fixed and limited by the lock cover fastened to the outer casing, wherein the lock casing is provided with a plurality of through holes for receiving step bars, wherein a retaining ring for fixing and limiting the step bars is fastened to the lock casing.

[0007] The invention further comprises a battery cover, a battery holder and a mounting base, wherein the battery cover is opposite the battery holder and is fixedly arranged between the lock cover and the lock housing, wherein the battery is inserted into the mounting base, and wherein the battery and the mounting base are then inserted into the battery holder.

[0008] The technical solution to accomplish the above task is as follows: 1. Since the outer casing, lock cover, and lock housing are defined by stepped bars and pins, the structure of a cylinder lock is formed. During emergency release, the emergency key is inserted, pushing the stepped bars and pins into the plane where the lock housing and lock cover touch. The outer casing can be removed from the lock housing by turning it counterclockwise, allowing for quick disassembly. 2. Since the battery holder is arranged on the carrier and the carrier is connected to the rear part, for emergency release only the battery holder needs to be turned clockwise, whereby the rear part, the lock core end and the bolt are also turned, so that the emergency release function is realized. 3. With the outer casing removed, the mounting base for mounting the battery can be removed from the battery cover and battery holder, and a new battery can be inserted. Then, the mounting base can be reinserted into the battery holder and battery cover, thus achieving the function of convenient battery replacement.

[0009] In the following, the invention is described in detail with reference to the accompanying drawings and the embodiment. Character list Fig. an exploded view of the invention, Fig. a sectional view of the first idle state of the invention, Fig. a sectional view of the second idle state of the invention, Fig. a sectional view of the first unlocking state of the invention, Fig. a sectional view of the second unlocking state of the invention, Fig. a front view of the lock base of the invention, Fig. a perspective view of the lock housing of the invention, Fig. a perspective view of the lock housing and the pins of the invention, Fig. a perspective view of the locking pieces and the blocking shaft of the invention, Fig. perspective view of the rotating sleeve of the invention, Fig. a representation of the lock housing and the battery cover of the invention, Fig. perspective view of the arrangement of the battery holder of the invention, Fig. a further perspective view of the arrangement of the battery holder of the invention. Ways to implement the invention

[0010] As in Fig. and Fig. As shown, the present invention is a key card cam lock comprising an outer casing 1, a lock body 2, a lock base 3, a lock cover 4, a rotary sleeve 5, an electromagnet 6, locking pieces 7 and locking piece springs 8, a tail piece 9, a retaining ring 10, a lock plug end 11, a latch 12, steel balls 13, steel ball springs 14, a mounting base 15, a battery holder 16, a bracket 17, step bars 18, pins 19, pin springs 20, and a battery cover 21.

[0011] The lock housing 2 and the lock cover 4 are connected to each other to form a receiving space. The lock cover 4 is fixedly arranged in the outer housing 1. The lock base 3 is accommodated in the lock housing 2. The battery cover 21 is opposite the battery holder 16 and is fixedly arranged between the lock cover 4 and the lock housing 2. The battery 22 is inserted into the mounting base 15. The battery 22 and the mounting base 15 are then inserted into the battery holder 16 (as shown in the Fig. until Fig. shown). The rear part 9 is placed on the lock base 3. The rear part 9 is connected by screws to the lock core end 11 so that the rear part 9 can rotate on the lock base 3. The rotating sleeve 5 is fixedly arranged in the lock housing 2. Two locking pieces 7 are provided in the rear part 9. The front end of each locking piece 7 is rounded. The two ends of the locking piece spring 8 each rest against a central hole of the locking piece 7 and against a limiting shaft of the rear part 9. The inner wall of the rotating sleeve 5 forms a wave ring 51. The rounded front end of the locking piece 7 is in contact with the wave ring 51 of the rotating sleeve 5 (as in Fig. shown). The electromagnet 6 is permanently installed in the rear part 9. A blocking shaft 61 is placed on the movable iron core of the electromagnet 6. The blocking shaft 61 can move back and forth between the two locking pieces 7 (as in Fig. shown). The blocking shaft 61 can rest against the two locking pieces 7 or be separated from them.

[0012] As in Fig. As shown, the lock base 3 is provided with three annular grooves around the center. The three annular grooves are, from the inside to the outside, an unlocking rotation groove 31, an emergency rotation groove 32, and a steel ball rotation groove 33. The unlocking rotation groove 31 and the emergency rotation groove 32 serve to cooperate with the locking shaft 61 of the electromagnet 6. The steel ball rotation groove 33 serves as a rolling groove for the steel balls 13. A locking shaft passage 34 is provided radially between the unlocking rotation groove 31 and the emergency rotation groove 32. In the locked state, the locking shaft 61 of the electromagnet 6 is located vertically in the passage 34, allowing the electromagnet 6 to retract and extend. The steel ball rotation groove 33 of the lock base 3 contains four limiting grooves 35 for limiting the position of the steel balls 13. Two through holes for receiving steel balls 13 are formed on the rear part 9.The steel ball springs 14 and the steel balls 13 are inserted one after the other into the through holes 91 of the rear part. The support 17 is attached to the top of the rear part 9, so that the steel balls 13 are confined by the steel ball springs 14 in the confinement grooves 35 of the lock base 3. The unlocking rotation groove 31 can also be a single groove.

[0013] The outer casing 1 is provided with several countersunk holes for receiving the pin springs 20 and the pins 19 (as in Fig. shown). The pin springs 20 and the pins 19 are successively inserted into the countersunk holes of the outer casing 1 and are fixed and limited by the lock cover 4 attached to the outer casing 1. The lock casing 2 is provided with a plurality of through holes 23 for receiving step bars 18 (as in Fig. shown). A retaining ring 10 is attached to the lock housing 2 to secure and limit the step bars 18. The step bars 18 and the pins 19 have different sizes. The sizes of the step bars 18 and pins 19 in a clockwise direction are: "small," "medium," and "large."

[0014] The working principle of the invention is as follows: I. Idle operation of the lock: When the rotating sleeve 5 is rotated, the locking pieces 7 move back and forth under the action of the wave ring 51 and the springs (as in Fig. and Fig. (shown). The force of the two steel ball springs 14 and steel balls 13 is much greater than the force of the locking pieces 7, so that the rotating sleeve 5 does not rotate the rear part 9. The rotating sleeve 5 is connected to the lock housing 2, the lock cover 4, and the outer housing 1. Therefore, when the outer housing 1 rotates the rotating sleeve 5, the lock is not opened, thus creating an idle effect. 2. Unlocking the lock: The electronic lock uses an IC card. Multiple and multi-level cards can be entered for customer use.

[0015] As in Fig. As shown, the unlocking rotation groove 31 of the lock base 3 is the rotation groove when the movable iron core of the electromagnet 6 is sucked in. The wall between the unlocking rotation groove 31 and the emergency rotation groove 32 can prevent the locking shaft 61 from jumping out during rotation, thereby invalidating the unlocking. The emergency rotation groove 32 in the center is a groove used for the movement of the locking shaft 61 during emergency unlocking. The largest steel ball rotation groove 33 is the groove in which the steel balls 13 roll.

[0016] As in Fig. , Fig. , Fig. , Fig. As shown, in the power-on state, the IC card is used to open the lock. The green light on the circuit board flashes. The movable iron core of the electromagnet 6 retreats. In the retreated position, the blocking shaft 61 is located between the two locking pieces 7 of the rear part 9. When the outer casing 1 is rotated, the rotating sleeve 5 rotates with it. The shaft ring 51 of the rotating sleeve 5 presses the locking pieces 7. Since the blocking shaft 61 is located between the two locking pieces 7, the locking pieces 7 cannot move back and forth. At this time, the outer casing 1, the lock cover 4, the lock casing 2, the rotating sleeve 5, the locking pieces 7, the blocking shaft 61, the rear part 9, the lock core end 11, and the bolt 12 are considered as a whole.If the force provided by turning the outer housing 1 clockwise is greater than the force of the two steel balls 13 and the steel ball springs 14 on the rear part 9, the bolt 12 can be moved so that the lock is unlocked.

[0017] After opening the lock by rotating it 90° clockwise, the blocking shaft 61 of the electromagnet 6 is still located in the smallest groove of the lock base 3. At this point, the electromagnet 6 is still in the retracted state, even if it is not energized, and can block the two locking pieces 7. If the outer housing 1 is rotated counterclockwise, the bolt 12 can be rotated with it, locking the lock.

[0018] 3. Emergency release: The outer casing 1 has six countersunk holes for accommodating the pin springs 20 and the pins 19. The lock cover 4 is fixed to the outer casing 1 with screws, thereby achieving a fixing and limiting effect for the pins 19. The lock casing 2 is provided with six through holes for accommodating the step bars 18. The retaining ring 10 is arranged under the lock casing 2 and is fixed with screws to fix and limit the step bars 18. The step bars 18 and the pins 19 are available in three sizes. The sizes of the step bars 18 and the pins 19 in a clockwise direction are: "small", "medium", and "large". The arrangement order is to prevent the step bars 18 and the pins 19 from protruding into the groove of the lock casing 2 when rotating.When assembling the outer housing 1 and the lock housing 2, the outer housing 1 is placed clockwise onto the lock housing 2, whereby the six pins 19 on the outer housing 1 are inserted into the six through holes on the lock housing 2, so that the outer housing 1 and the lock housing 2 are fixed.

[0019] When using the emergency key, the teeth of the key push the step bars 18 into the plane where the lock housing 2 and the lock cover 4 touch. At this point, the step bars 18, the pins 19, the lock housing 2, and the lock cover 4 are in the same plane. The outer housing 1 can be removed from the lock housing 2 by turning it counterclockwise (as shown in Fig. shown).

[0020] The battery cover, battery holder 16, support 17, tail section 9, lock core end 11, and latch 12 are integrally connected. After removing the outer casing 1, the battery holder 16 is rotated clockwise. The locking shaft 61 of the movable iron core of the electromagnet 6 moves in the locking shaft passage 34 of the lock base 3. When the force for rotating the battery holder 16 clockwise exceeds the force of the steel ball springs 14 and the steel balls 13 on the tail section 9, the battery holder 16 rotates the latch 12 clockwise, thereby achieving an emergency release effect. Likewise, the lock can be closed by rotating the battery holder 16 counterclockwise in this state.

[0021] 4. Quick battery replacement: With the outer casing 1 removed, the mounting base 15 for mounting the battery can be removed from the battery cover 21 and the battery holder 16, and a new battery can be inserted. Then, the mounting base 15 is reinserted into the battery holder 16 and the battery cover 21, thereby achieving the function of convenient battery replacement (as shown in Fig. shown). List of reference symbols 1 outer casing 10 retaining ring 11 Lock core end 12 bars 13 steel balls 14 steel ball springs 15 Mounting base 16 battery holders 17 carriers 18 step staff 19 pen 2 lock housings 20 pen springs 21 Battery cover 22 Battery 23 Through hole of the lock housing 3 Castle base 31 Release groove 32 Emergency turning groove 33 Steel ball turning groove 34 Blocking shaft passage 35 Limit groove 4 lock covers 5 rotating sleeve 51 Shaft ring 6 Electromagnet 61 Blocking shaft 7 locking piece 8 locking piece spring 9 Rear section 91 through hole

Claims

[1] Key card cam lock comprising an outer casing (1), a lock housing (2), a lock base (3), a lock cover (4), a rotary sleeve (5), an electromagnet (6), locking pieces (7) and locking piece springs (8), a rear part (9), a retaining ring (10), steel balls (13), steel ball springs (14), a mounting base (15), a battery holder (16), a carrier (17), step bars (18), pins (19) and pin springs (20), wherein the lock housing (2) and the lock cover (4) are connected to each other to form a receiving space, wherein the lock cover (4) is fixedly arranged in the outer casing (1), wherein the lock base (3) is received in the lock housing (2), wherein the rear part (9) is plugged onto the lock base (3), wherein the rear part (9) is connected by screws to a lock core end (11) so that the rear part (9) is on the lock base (3) can rotate, wherein the rotating sleeve (5) is fixedly arranged in the lock housing (2),wherein the locking pieces (7) are provided in the rear part (9), the front end of each locking piece (7) being rounded, the two ends of the locking piece spring (8) each abutting a central hole of the locking piece (7) and a limiting shaft of the rear part (9), the inner wall of the rotating sleeve (5) forming a shaft ring (51), the rounded front end of the locking piece (7) being in contact with the shaft ring (51) of the rotating sleeve (5), the electromagnet (6) being fixedly installed in the rear part (9), a blocking shaft (61) being placed on the movable iron core of the electromagnet (6), the blocking shaft (61) being able to move back and forth between the two locking pieces (7), whereby the blocking shaft (61) can abut against or be separated from the two locking pieces (7); and the lock base (3) being provided with a steel ball rotating groove (33),wherein the steel ball rotation groove (33) of the lock base (3) contains a plurality of limiting grooves (35) for limiting the position of the steel balls (13), wherein two through holes (91) for receiving the steel balls (13) are formed on the rear part (9), wherein the steel ball springs (14) and the steel balls (13) are successively brought into the through holes (91) of the rear part (9), wherein the carrier (17) is attached to the upper side of the rear part (9) so that the steel balls (13) are limited by the steel ball springs (14) in the limiting grooves (35) of the lock base (3). [2] Key card cam lock according to claim 1, characterized byin that the lock base (3) is provided with three annular grooves around the center, the three annular grooves being, from the inside out, an unlocking rotary groove (31), an emergency rotary groove (32) and the steel ball rotary groove (33), the unlocking rotary groove (31) and the emergency rotary groove (32) serving to cooperate with the blocking shaft (61) of the electromagnet (6), a blocking shaft passage (34) being provided in the radial direction between the unlocking rotary groove (31) and the emergency rotary groove (32), the blocking shaft (61) of the electromagnet (6) being located vertically in the passage (34) in the locked state, the electromagnet (6) being able to retract and extend. [3] Key card cam lock according to claim 1, characterized byin that the outer housing (1) is provided with a plurality of countersunk holes for receiving the pin springs (20) and the pins (19), wherein the pin springs (20) and the pins (19) are introduced one after the other into the countersunk holes of the outer housing (1) and are fixed and limited by the lock cover (4) fastened to the outer housing (1), wherein the lock housing (2) is provided with a plurality of through holes (23) for receiving the step bars (18), wherein the retaining ring (10) for fixing and limiting the step bars (18) is fastened to the lock housing (2). [4] Key card cam lock according to claim 1, characterized bya battery cover (21), the battery holder (16) and the mounting base (15), wherein the battery cover (21) is opposite the battery holder (16) and is fixedly arranged between the lock cover (4) and the lock housing (2), wherein a battery (22) is inserted into the mounting base (15), and wherein the battery (22) and the mounting base (15) are then introduced into the battery holder (16).

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